KR20120138791A - Method for optimizing activation/deactivation idle state signaling reduction(isr) and network side device - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to the field of mobile communications technologies and discloses a method of optimizing activation / deactivation of an ISR and an apparatus on the network side. The method may include, in an area update process of a UE, a first network entity receiving a context request message sent by a second network entity, and a mobile reachable timer or an implicit detach corresponding to the UE. Determining the activation or deactivation of the ISR according to an operation state of an timer, or a mobile reachable timer and an implicit detach timer. And sending, by the first network entity, a confirmation result to a second network entity, confirming that the second network entity instructs the UE to activate or deactivate the ISR according to the confirmation result. According to the present invention, the execution flow of the conventional ISR activation / deactivation is optimized so that the ISR processing of the network side and the UE side is well matched and unnecessary signaling overhead is prevented.

Description

METHOD FOR OPTIMIZING ACTIVATION / DEACTIVATION IDLE STATE SIGNALING REDUCTION (ISR) AND NETWORK SIDE DEVICE}

The present invention claims the priority of the Chinese patent application, the application number 201010209863.1, which is filed with the JPO on June 18, 2010, and the name of the invention is 'Method of optimizing activation / deactivation of ISR and apparatus on the network side'. The entire contents of the Chinese patent application are incorporated herein by reference.

TECHNICAL FIELD The present invention relates to the field of mobile communication technologies, and more particularly, to a method for optimizing activation / deactivation of an ISR, an apparatus on a network side, an ISR operation method on a UE (user terminal) side, and a UE.

In Evolved Packet System (EPS), Idle State Signaling Reduction (ISR) is a technique for reducing signaling in the idle state, which reduces the signaling burden between an idle (ILDE) user equipment (UE) and the network. .

Serving GPRS Support Nod (SGSN) is a Network Entity in the Universal Terrestrial Radio Access Network (UTRAN) and Mobility Management Entity (UTM). Mobility management entity) is a network entity in the Evolved Universal Terrestrial Radio Access Network (E-UTRAN).

The tracking area (TA) in the registered TAI (Tracking Area Identifier) LIST of the E-UTRAN when the UE is registered with the MME in the E-UTRAN and SGSN in the UTRAN and is idle after ISR is activated. There is no need for signaling interaction with the network side when camping or traveling in a registered RA (Routing Area) of the UTRAN.

The activation of the ISR is controlled by the network side, when the idle UE initiates a Tracking Area Update (TAU) or Routing Area Update (RAU) in the E-UTRAN or UTRAN, the MME or The SGSN instructs the UE whether to activate the ISR through the TAU accept message or the RAU accept message, and the UE activates or deactivates the ISR according to the indication. The initial value of TIN (Temporary Identity used in Next update) is set by the UE after the ATTACH is successful. When the initial ATTACH succeeds in the E-UTRAN, the UE resets to GUTI (Globally Unique Temporary Identity Global Unique (User) Temporary Identifier) regardless of what the original value of the TIN is. On the other hand, when the initial ATTACH succeeds in GERAN / UTRAN, the UE resets to Packet Temporary Mobile Station Identity (P-TMSI) regardless of the original value of the TIN. In addition, when the TAU accept message or the RAU accept message received by the UE indicates ISR deactivation, it is set to GUTI or P-TMSI regardless of the original value of the TIN stored locally. If ISR activation is indicated by the TAU accept message, the UE determines the setting of the TIN according to the value of the TIN. If the TIN value is P-TMSI or RAT-related TMSI (Radio Access Type related TMSI), the TIN is set to RAT-related TMSI. If the TIN value is GUTI, the TIN value is set to GUTI. do. On the other hand, if ISR activation is indicated by the RAU accept message, the UE determines the setting of the TIN according to the TIN value. If the TIN value is GUTI or RAT-related TMSI, the TIN value is set to RAT-related TMSI, and if the TIN value is P-TMSI, the TIN value is set to P-TMSI. The TIN value here is just a distinction.

“Area update” herein refers to “tracking area update” or “routing area update”. Hereinafter, a process in which the UE enters the E-UTRAN and starts the TAU process after being ATTACHed to the network through the UTRAN will be described as an example. As shown in FIG. 1, the TAU process includes the following steps.

When the UE enters the TA in the E-UTRAN from the RA in the UTRAN, if determined to satisfy the TAU trigger condition, triggers the TAU initiation (step S101); The UE sends a tracking area update request to the MME (steps S102 to S103); Since the UE is registered in the existing S4 SGSN (a kind of SGSN and supports ISR, and all SGSNs in this application point to S4-SGSN), the new MME requests the context information of the UE to the existing SGSN (step S104, step S105). , Step S107); Then the MME notifies the serving GW / PDN GW (Packet Data Network Gateway) to modify the bearer information of the UE (steps S109 to S113); The MME sends a location update request to the HSS to notify the HSS to delete the UE location information in the existing SGSN (steps S114 to S116); the existing SGSN releases the Iu interface connection (steps S117 and S118); The HSS feeds back a location update response message to the MME (step S119); The MME feeds back the tracking area update acceptance message to the UE to complete the tracking area update (steps S120 to S121). In the process of the TAU, the MME may authenticate again to the UE (step S106).

Conventional norms (TS23.060 and TS23.401) define the contents related to ISR activation in the TAU process as follows.

In step S105, when SGSN sends a context response message to the MME, instructs ISR activation,

In step S107, when the SGSN receives the context confirmation message sent from the MME, and this message indicates ISR activation, the SGSN must maintain the context of the UE.

The problem caused by the above specification is described below by combining several related timers.

The mobile reachable timer of the UE is maintained on the network side, and the mobile reachable timer is operated in the IDLE state of the UE, and the non-access stratum (NAS) of the UE and the network side is disconnected. Layer) Once the signaling connection is established (UE enters the connected state), the Mobile Reachable timer is stopped by the network side.

Implicit detach if the Implicit Detach Timer of the UE is maintained on the network side and the NAS signaling connection is not established between the UE and the network side while the Mobile Reachable timer expires. An implicit detach timer is initiated by an implicit detach process by the network side, and when the timer expires, an implicit detach process is activated by the network side, and when a NAS signaling connection is established between the UE and the network side, Stopped by

The UE maintains one of the periodic TAU timer and the periodic RAU timer, or the periodic TAU timer and the periodic RAU timer together according to the connection method and the ISR state.

When connected via the UTRAN in case of ISR deactivation, the UE must maintain a periodic RAU timer, and if the periodic RAU timer expires, the UE must initiate a periodic RAU process. On the other hand, when ISR is deactivated, when connected through the E-UTRAN, the UE should maintain a periodic TAU timer, and if the periodic TAU timer expires, the UE should initiate a periodic TAU process. After the UE enters the idle state, one of the periodic TAU timer and the periodic RAU timer, or the periodic TAU timer and the periodic RAU timer, is simultaneously activated and stopped when a NAS signaling connection is established between the UE and the network.

After the ISR is activated, the UE should keep both timers at the same time. When the UE stays in UTRAN, if the periodic TAU timer expires, the UE should activate the E-UTRAN Deactivate ISR Timer and immediately upon the next time the UE enters the E-UTRAN. The TAU process must be initiated. If the E-UTRAN Deactivate ISR Timer expires, the UE must deactivate the ISR locally, i. E., Set the TIN to " P-TMSI ". The E-UTRAN Deactivate ISR Timer is activated when the UE enters EMM-DEREGISTERED (EPS Mobility Management-CONNECTED) or EMM-CONNECTED (EPS Mobility Management-CONNECTED) mode. Stop. If the UE stays in the E-UTRAN If the periodic RAU timer expires, the UE must activate the GERAN / UTRAN Deactivate ISR Timer, and if the UE next enters the UTRAN, the UE The RAU process must be started immediately. GERAN (GSM EDGE Radio Access Network, GSM EDGE Radio Access Network, where GSM: Global System for Mobile communication, EDGE: Enhanced Data rates for GSM Evolution) / UTRAN If the DEACTIVATE ISR Timer expires, the UE must deactivate ISR. When the UE enters GMM-DEREGISTERED (GPRS Mobility Management-DEREGISTERED) or GMM-CONNECTED mode, the GERAN / UTRAN ISR deactivation timer is stopped.

According to the current regulations, the timer length (ie, timing period) of the mobile reachable timer is equal to the following. Is a little longer than the specified time of periodic TAU TIMER or periodic RAU TIMER. When ISR is activated, the timer value of the Implicit Detach Timer in the MME must be longer than the timer value of the E-UTRAN Deactivate ISR Timer of the UE, and the timer value of the Implicit Detach Timer in the SGSN is the timer value of the GERAN / UTRAN Deactivate ISR Timer of the UE. It must be longer.

When the UE initiates the RAU, it includes different identifiers in the RAU request according to the setting value of the TIN. After the ISR is activated (in which case the TIN is set to RAT-related TMSI), the RAU request only needs to include P-TMSI (Packet Temporary Mobile Station Identity). If ISR is disabled, if TIN is set to P-TMSI then only P-TMSI is included in the RAU request. If the TIN is set to GUTI, the UE maps GUTI (Globally Unique Temporary Identity) to P-TMSI and includes it in the RAU request message. If the UE also has a P-TMSI, the P-TMSI should also be included in the RAU request message. When the SGSN receives a request including two temporary identifiers, the presence of the UE context may be searched locally using the P-TMSI.

Thus, in step S105, if the existing SGSN receives a context request message from the MME after expiration of the UE's Mobile Reachable timer, but before expiration of the Implicit Detach Timer (step S104), if the SGSN still instructs the MME to activate the ISR, the MME Instructs the UE to activate ISR. At this time, since the UE first set its TIN to P-TMSI through the UTRAN ATTACH, when the TAU accept message indicates ISR activation, the UE sets the TIN to RAT-related TMSI. If the UE returns from the E-UTRAN back to the UTRAN at the same time and the UE determines the activation state of the ISR (that is, the TIN is set to RAT-related TMSI), the RAU is started using an identifier of P-TMSI. Since the Implicit Detach Timer maintained by SGSN may have already expired and SGSN initiates an implicit detach process after expiration of the Implicit Detach Timer, the SGSN has no context of the UE, so SGSN does not have the context of the UE in the network according to P-TMSI. The context cannot be detected. At this time, since the RAU request of the UE is rejected by the network, the UE must start the ATTACH process again. The network may also initiate the authentication process again. Due to the difference between the ISR state of the UE side and the ISR state of the network side (network side holding state relative to the context of the UE), a certain time delay occurs in the connection process of the UE through the UTRAN.

Also, in step S107, the SGSN mentioned that the context of the UE should be maintained after receiving the context confirmation message from the MME, but the norm did not define the specific maintenance time of the UE context. If SGSN receives the context request message from the MME after expiration of the UE's Mobile Reachable timer and before the implicit Detach Timer expires, it instructs the MME to activate ISR and implicit detach. If the UE continues to maintain the context of the UE after the expiration of the Implicit Detach Timer, a lot of useless contexts appear in the SGSN and there is no mechanism for removing such useless information.

The above problem can be solved on the UE side by deactivating ISR locally. The basic idea of this method is as follows.

1) When the network instructs the UE to activate the ISR via the RAU in the UTRAN, if the UE's periodic TAU timer has already expired, the UE does not activate the ISR or deactivates the ISR locally. Thereafter, if the UE enters the E-UTRAN, when the UE initiates the TAU, the TAU request message will include two temporary identifiers, P-TMSI and GUTI.

2) When the network instructs the UE to activate the ISR via the TAU in the E-UTRAN, if the UE's periodic RAU timer has already expired, the UE does not activate the ISR or deactivates the ISR locally. After that, if the UE enters the UTRAN, when the UE operates the RAU, the RAU request message includes two temporary identifiers, P-TMSI and GUTI.

The above method still has a problem that the context maintenance state indicated by the ISR state of the UE side does not coincide with the actual state of maintenance. Also, when the UE moves from one network to another, irrespective of the situation, Both TAU and RAU requests contain two identifiers, to some extent, the air interface resources. In addition, since the network side needs to receive and process two temporary identifiers, the signaling overhead of the network side is increased and the processing time of the TAU or RAU is extended.

The present invention provides a method for optimizing activation / deactivation of ISR for optimizing a conventional ISR activation process and an ISR activation method, an apparatus on a network side, an ISR operation method on a UE side, and a user terminal (UE).

Method for optimizing the activation / deactivation of ISR (Idle State Signaling Reduction) according to the present invention,

In an area update process of a UE, a first network entity receives a context request message sent from a second network entity, and a mobile reachable timer and / or an implicit detach timer corresponding to the UE. Confirming activation or deactivation of the ISR according to an operating situation of the Detach Timer, wherein the first network entity belongs to the first network and the second network entity belongs to the second network; And

Confirming, by the first network entity, to transmit a result of the determination to the second network entity, instructing the UE to activate or deactivate the ISR according to the result of the determination received by the second network entity.

In addition, the ISR operation method of the UE side according to the present invention,

The UE receiving an ISR activation indication sent from the network side in an area update process of the second network; And

Determining, by the UE, expiration of the periodic area update timer of the first network of the UE, starting or stopping and reactivating the ISR deactivation timer of the first network of the UE.

In addition, the apparatus on the first network side located in the first network for optimizing the activation / deactivation of the ISR according to the present invention,

In the UE's area update process, upon receiving a context request message sent from a device on a second network side located in a second network, a mobile reachable timer and / or implicit detach corresponding to the UE. First activation deciding means for deciding ISR activation or deactivation in accordance with an operational state of an implicit detach timer; And

Transmitting means for transmitting the determination result to the apparatus on the second network side.

The user terminal UE according to the present invention,

Instruction receiving means for receiving an ISR activation instruction sent from the network side in an area update process of the second network; And

Receiving the ISR activation indication, the ISR deactivation timer is reactivated by confirming the expiration of the periodic area update timer of the first network of the UE and activating or stopping the ISR deactivation timer of the first network of the UE. Means;

The present invention optimizes the process of activating and deactivating the conventional ISR and the ISR operation method of the UE side, thereby ensuring excellent agreement between the network side and the ISR processing of the UE side, thereby preventing unnecessary signaling overhead.

1 is a flow chart of the area update process defined in the prior art.
2 is a flow diagram of a method of optimizing activation / deactivation of an ISR in accordance with the present invention.
3 is a flowchart of a method of optimizing activation / deactivation of an ISR according to an embodiment of the present invention.
4 is a flowchart of a method for optimizing activation / deactivation of an ISR devised in consideration of an application scenario in an embodiment according to the present invention;
5 is a flowchart of a method of optimizing activation / deactivation of another ISR according to an embodiment of the present invention.
6 is a flowchart of an ISR operation method on a UE side according to an embodiment of the present invention.
7 is a flowchart of a method for optimizing activation / deactivation of another ISR devised in consideration of an application scenario in an embodiment according to the present invention;
8 is a block diagram illustrating the structure of an apparatus on the first network side to optimize activation / deactivation of an ISR according to an embodiment of the present invention.
9 is a structural diagram of a user terminal UE according to an embodiment of the present invention.

Hereinafter, a method and an apparatus on a network side, an ISR operation method on a UE side, and a UE for optimizing activation / deactivation of an ISR according to the present invention will be described in detail with reference to the accompanying drawings and embodiments.

In the prior art, when confirming whether the MME and SGSN interaction activate the ISR, if it is confirmed that the current network node supports the ISR activation, the ISR is activated. However, due to this, the ISR state of the network side and the UE side may not be the same. In order to overcome such a problem, the present invention provides a method for optimizing activation / deactivation of the ISR, as shown in FIG. 2. The method includes step S201 and step S202.

In step S201, in the area update process of the UE, the first network entity receives a context request message sent from the second network entity and thus a mobile reachable timer or an implicit detach timer corresponding to the UE. Determine the activation or deactivation of the ISR according to the operation status of the Detach Timer or the Mobile Reachable Timer and the Implicit Detach Timer.

Preferably the area update process initiates a TAU process when the UE enters a TA in the E-UTRAN from a RA in the UTRAN. Wherein the first network entity is SGSN and the second network entity is MME.

Or the area update process is a RAU process that operates when the UE enters the RA in the UTRAN from the TA in the E-UTRAN. Wherein the first network entity is an MME and the second network entity is an SGSN.

In step S202, the first network entity sends a confirmation result to the second network entity. The second network entity determines to instruct the UE to activate or deactivate the ISR according to the received determination result. Preferably the second network entity sends an activation or deactivation indication of the ISR to the first network entity via a context confirmation message.

In a specific example, the first network entity sends the confirmation result to the second network entity via the context response message.

Preferably, if the area update process is specifically a TAU process operating when the UE enters from the RA in the UTRAN to the TA in the E-UTRAN, the SGSN sends a confirmation result to the MME.

Or if the area update process is specifically an RAU process that starts when the UE goes from TA in E-UTRAN to RA in UTRAN, the MME sends a confirmation result to SGSN.

Specifically, the Mobile Reachable timer is maintained by the first network entity and is activated when the UE enters an idle state and when the UE enters a connected state, i.e. the first It stops when establishing a NAS signaling connection with a network entity and activates an implicit detach timer when the timer expires. An implicit Detach Timer is maintained by the first network entity and is stopped when the UE enters a connected state or when a NAS signaling connection between a UE and the first network entity is established, and the timer is When expired, trigger the first network entity to perform a detach process of the UE. However, the detach process deletes the context of the UE maintained at the first network entity.

The first network entity according to the present invention activates the ISR according to the operating conditions of the mobile reachable timer and the implicit detach timer of the UE maintained by the UE when the context request is received. However, as in the conventional execution flow, the ISR is not activated only when the network node supports ISR activation. If the ATTACH timer is operated according to the expiration of the mobile reachable timer as in the related art, the context may be lost when the UE comes back when the ISR is activated. However, in the present invention, the mobile reachable timer is performed. Resolve the conventional problem by determining ISR activation depending on the operation of the Reachable timer, the implicit Detach Timer, or the Mobile Reachable Timer and the Implicit Detach Timer. Solved.

Hereinafter, preferred embodiments of the present invention are provided.

According to Embodiment 1 of the present invention, the optimization method of activating / deactivating the ISR as shown in FIG. 3 includes the following steps.

In step S301, in the area update process of the UE, the first network entity receives a context request message sent from the second network entity.

In step S302, the first network entity determines whether the mobile reachable timer of the UE that it maintains expires, and if not, performs step S303, and if expired, performs step S304.

In step S303, the first network entity confirms ISR activation.

Since the Mobile Reachable timer has not expired, the Implicit Detach Timer corresponding to the UE has not yet operated. According to current norms, when ISR is active, the length of time specified in the Implicit Detach Timer operation is longer than the length of the ISR Deactivation timer of the UE's first network, and the UE is again in the ISR enabled state. Even when returning to the network where the network entity is located, since the context of the UE is still stored in the first network entity, the UE context cannot be detected as in the prior art.

In step S304, the first network entity confirms ISR deactivation.

Of course, the activation or deactivation of the ISR may be determined by determining whether an implicit detach timer corresponding to the UE is operating in step S302 of this embodiment. If not, step S303 is performed; if it is, step S304 is performed.

In addition, by determining whether the implicit detach timer (Implicit Detach Timer) and the mobile reachable timer (Mobile Reachable timer) is determined to determine the activation or deactivation of the ISR according to the determination result.

The expiration of the Mobile Reachable Timer makes the implicit Detach Timer work, and the Implicit Detach Timer makes the UE context clear after a while. Means ISR deactivation. Thus, even though the UE returns to the network with the first network entity by deactivating the ISR immediately after receiving the ISR deactivation indication, the network side has not activated the ISR on the network side and the UE side, so that the network side according to the identifier provided by the UE There is no situation where no context can be detected.

Herein, the ISR deactivation according to the present invention includes a case in which the UE maintains that the ISR is not activated because the UE does not activate the ISR, and a case in which the UE has already activated the SR but deactivates the ISR.

Hereinafter, a specific process of an embodiment according to the present invention will be described by combining specific application scenarios.

〈Application Scenario 1〉

If the UE is a RAU activated when entering the RA in the UTRAN from the TA in the E-UTRAN, select the UE stays in the UTRAN.

As shown in FIG. 4, in the case where the UE reselects a cell and is connected to the UTRAN after the UE is connected through the E-UTRAN and ATTACHed to the EPS system, the UE according to the present embodiment activates / deactivates as follows. To perform.

In step S401, the UE sends a RAU request message to SGSN; The periodic TAU timer of the UE expires before or after transmission of the message.

In step S402, the SGSN receives the RAU request message sent by the UE and transmits a CONTEXT REQUEST message to the MME.

In step S403, the MME receives a CONTEXT REQUEST message sent by SGSN, and determines whether the mobile reachable timer of the UE maintained by the MME itself has expired.

If the Mobile Reachable timer (Mobile Reachable timer) corresponding to the UE has not expired, the MME determines the ISR activation.

If the mobile reachable timer corresponding to the UE has already expired, the implicit detach timer is not completed yet according to the conventional timer length specification and processing. When the operation of the Implicit Detach Timer is confirmed, the MME confirms the deactivation of the ISR.

In step S404, the SGSN receives the result after activation / deactivation of the ISR transmitted through the context response message from the MME, and determines whether to indicate ISR activation or ISR deactivation in consideration of whether the network node supports ISR activation.

In step S405, the SGSN sends an ISR activation / ISR deactivation indication to the MME through a context confirmation message.

In step S406, the SGSN transmits an activation / deactivation indication of the ISR to the UE through a RAU ACCEPT message, and the UE processes the activation / deactivation of the conventional ISR.

Upon the expiration of the Mobile Reachable timer or the operation of the implicit Detach Timer, the deactivation of the ISR is determined so that the ISR state of the UE side is set to deactivation. Accordingly, even when the UE returns to the E-UTRAN, since the TAU is operated using one temporary identifier, both the ISR state of the network side and the ISR state of the UE side are in an inactive state and both are coincident. Thus, in case of ISR activation, the UE provides the temporary identifier to the network, but the network may prevent the situation in which the UE context cannot be detected according to the temporary identifier.

〈Application Scenario 2〉

If the UE is a TAU starting from a RA in the UTRAN to a TA in the E-UTRAN, the UE chooses to stay in the E-UTRAN.

After the UE is connected via the UTRAN and ATTACHed to the EPS system, when the UE re-elects the cell and is connected to the E-UTRAN, the UE performs the activation / deactivation process as follows.

The UE sends a TAU request message to the MME;

The MME receives the TAU request message sent by the UE and sends a CONTEXT REQUEST message to the SGSN;

SGSN receives a CONTEXT REQUEST message sent by the MME, and determines whether or not the Mobile Reachable timer of the UE maintained by the SGSN expires;

If the Mobile Reachable timer (Mobile Reachable timer) corresponding to the UE has not expired, SGSN confirms ISR activation;

If the Mobile Reachable timer (Mobile Reachable timer) corresponding to the UE has already expired, an implicit Detach Timer is defined according to the length rule and processing of the conventional timer. If the) has not yet expired and the operation of the implicit Detach Timer is confirmed, SGSN confirms ISR deactivation;

The MME receives a confirmation result of activation / deactivation of the ISR sent through a context response message from the SGSN, and confirms an indication of ISR activation or ISR deactivation in consideration of whether or not this network node supports ISR activation;

The MME sends an indication to the SGSN via the context confirmation message for the ISR activation / ISR deactivation;

The MME receives the TAU ACCEPT message through the TAU and transmits an ISR activation / deactivation indication to the UE, and the UE may process the conventional ISR according to the activation / deactivation process.

In addition, the embodiment according to the present invention improves the optimization method of the activation / deactivation of another ISR, and includes the following steps as shown in FIG.

In step S501, in the area update process of the UE, the first network entity receives a context request message sent from the second network entity.

In step S502, the first network entity determines whether the mobile reachable timer corresponding to the UE has expired, and if it has not yet expired, performs step S503, and if expired, performs step S504.

In step S503, the first network entity confirms ISR activation.

The Mobile Reachable timer has not yet expired and has not activated the Implicit Detach Timer, but according to conventional convention the length of the Implicit Detach Timer is the first of the UE. Since the network is longer than the length of the ISR deactivation timer, the UE context is still storing the UE context at the first network entity when the UE returns to the network with the first network entity in the active state of the ISR, so that the UE context is as in the prior art. The problem of not detecting it does not occur.

In step S504, the first network entity confirms the ISR activation and transmits the result of the determination of the ISR activation to the second network entity.

In step S505, after receiving the determination result of the ISR activation, the second network entity determines to instruct the UE to activate the ISR if the network node is determined to support the ISR activation, and instructs the ISR activation. In addition to transmitting to the UE through the area update reception message, the transmission is sent to the first network entity through the context confirmation message.

Wherein if the periodic update timer of the first network of the UE has already expired when the UE receives an indication for ISR activation sent by the second network, the UE restarts or restarts the ISR deactivation timer of the first network. Works.

Since reactivation after the stop described in the embodiment according to the present invention means reactivation immediately, reactivation shown in the following embodiments means reactivation after all mod stops.

In step S506, after the first network entity receives the fed back ISR activation indication from the second network entity, if the implicit detach timer corresponding to the UE is running, the UE is in the first network an ISR. Specify an interval longer than the specified time to deactivate the Amplicit Detach Timer (corresponding to the UE).

Of course, in step S502, it may be determined whether or not to activate the ISR depending on whether the implicit detach timer (Implicit Detach Timer).

The area update timer of the first network is maintained by the UE, periodically activated in the idle state of the UE, stopped when the NAS signaling connection is established between the UE, that is, the UE and the first network, and the timer Expires, trigger the UE to perform the area update.

The ISR deactivation timer of the first network is maintained by the UE and is activated when the ISR is activated with the expiration of the area update timer of the first network, the connected state of the UE, that is, the UE and the first network. It stops when the NAS signaling connection is established, and deactivates the ISR by giving the UE when its timer expires.

Preferably, the first network entity is a mobility management entity (MME) and the second network entity is a serving GPRS support node (SGSN). It is also preferable that the ISR deactivation timer of the first network of the UE is an E-UTRAN ISR deactivation timer, and the periodic timer of the first network is a periodic tracking area update timer.

Alternatively, the first network entity is SGSN, the second network entity is an MME, the ISR deactivation timer of the first network of the UE is a GERAN / UTRAN ISR deactivation timer, and the periodic timer of the first network is a periodic routing area. Update tracking area (periodic tracking area update timer).

That is, the first network corresponds to the first network entity, and the second network corresponds to the second network entity.

If it is determined that the UE is instructed to activate ISR, the UE and the first network entity simultaneously operate the ISR deactivation timer and the implicit detach timer of the first network. According to the conventional norm, when the ISR is activated, since the designation time of the implicit detach timer is longer than the designation time of the ISR deactivation timer of the first network, the UE returns to the network having the first network entity. Upon returning the first network entity does not delete the UE context if the UE's first network ISR deactivation timer has not yet expired. If the first network ISR deactivation timer of the UE has already expired, there is no problem even if the UE has already deactivated the ISR, at which time the ISR has not deactivated the ISR.

In addition, an embodiment according to the present invention provides an ISR operation method on the UE side, and includes the following steps as shown in FIG.

In step S601, the UE receives an ISR activation indication sent by the network side in the area update process of the second network.

In step S602, the UE checks whether the area update timer of the first network expires, and if it does not expire, performs step S603, and if expired, performs step S604.

In step S603, the processing may be performed in accordance with a conventional execution flow. That is, after receiving the region update reception message including the ISR activation support information, the ISR is activated. If the transition to the IDLE state has expired in the region update process, the region update periodic timer of the second network is activated, and if the region update timer expires and is in the idle state, the ISR deactivation timer of the second network is activated.

In step S604, the UE starts or reactivates the ISR deactivation timer of the first network of the UE.

Preferably, the area update process of the second network is a routing area update process, and the periodic area update timer of the first network is a periodic tracking area update timer. It is also preferable that the ISR deactivation timer of the first network is an E-UTRAN ISR deactivation timer.

Alternatively, the area update process of the second network is a tracking area update process, the periodic area update timer of the first network is a periodic routing area update timer, and the ISR deactivation timer of the first network is GERAN / UTRAN ISR deactivation. It is a timer.

Hereinafter, a specific execution flow of an embodiment according to the present invention will be described by combining specific application scenarios.

〈Application Scenario 1〉

If the UE is a RAU starting from the TA in the E-UTRAN to the RA in the UTRAN, ie the UE chooses to stay in the UTRAN.

As shown in FIG. 7, when the UE is connected via the E-UTRAN to ATTACH the EPS system and the UE reselects a cell to access the UTRAN, in this embodiment, the entire cell flow of the activation / deactivation operation is As follows.

In step S701, the UE sends a RAU request message to the SGSN, and at some time before or after the transmission of the message, the UE's periodic area update timer-TAU timer has expired but the UE still has not received the RAU received message.

In step S702, the SGSN receives the RAU request message sent from the UE and transmits a CONTEXT REQUEST message to the MME.

The MME receives a CONTEXT REQUEST message sent by SGSN to indicate whether the UE's mobile reachable timer (Mobile Reachable timer) has expired and implicitly. Determines whether an implicit detach timer is operating.

If the Mobile Reachable timer (Mobile Reachable timer) corresponding to the UE is less than the minimum, the MME confirms the ISR activation, and then processes according to the conventional execution flow and no longer. Do not explain.

If the mobile reachable timer corresponding to the UE has already expired and the implicit detach timer is operating, the ISR activation is determined. From now on, all the descriptions of the execution flow will be given by this situation.

In step S703, when the SGSN receives the confirmation result of the ISR activation transmitted through the context response message from the MME, and when the SGSN is determined to instruct the UE to activate the ISR according to whether or not the SGSN supports the ISR activation, Perform S704

In step S704, the SGSN sends an ISR activation indication to the MME through a context confirmation message.

In step S705, when the MME receives the ISR activation instruction through the context confirmation message, if an implicit detachment timer corresponding to the UE is in operation, the MME determines that the UE has received the E-UTRAN ISR deactivation timer value An implicit detach timer corresponding to the UE is operated again at a longer designated time.

In step S706, the SGSN sends an ISR activation indication to the UE via RAU ACCEPT.

In step S707, when the UE receives the RAU ACCEPT message including the ISR activation indication, the UE checks whether the periodic tracking area update timer of the UE expires, and if it expires, starts or restarts the UE's E-UTRAN ISR deactivation timer. do.

〈Application Scenario 2〉

If the UE is a TAU disclosed in a TA in the E-UTRAN from a RA in the UTRAN, i.e. select to stay in the E-UTRAN.

When the UE is connected through the UTRAN to ATTACH to the EPS system and the UE reselects a cell to be connected to the E-UTRAN, in this embodiment, an execution flow for completing the activation / deactivation operation by the UE is as follows.

The UE sends a TAU request message to the MME, before or after the transmission of the message, the UE's periodic area update timer, RAU timer has expired but the UE has not yet received the TAU received message;

The MME receives a TAU request message sent by the UE and sends a CONTEXT REQUEST message to the SGSN;

The SGSN receives a CONTEXT REQUEST message by the MME, and whether the UE maintains its Mobile Reachable timer (Mobile Reachable timer) expires and implicit detach. Determine whether the timer (Implicit Detach Timer) is operating.

If the Mobile Reachable timer corresponding to the UE is less than the SGSN, the SGSN confirms the ISR activation and then processes according to the conventional execution flow.

If the mobile reachable timer corresponding to the UE expires and an implicit detach timer is running, the ISR activation is determined. From now on, all the descriptions of the execution flow will be given by this situation.

When the MME receives the confirmation result of the ISR activation sent from the SGSN through a context response message, and the MME confirms that the UE supports the ISR activation according to whether or not it supports ISR activation, the MME uses the context confirmation message. Send an ISR activation indication to SGSN.

When SGSN receives an ISR activation indication through the context confirmation message, if an implicit Detach Timer corresponding to the UE is running, the intelligence time is longer than the GERAN / UTRAN ISR Deactivation timer value of the UE. As a result, the implicit detach timer (Implicit Detach Timer) corresponding to the UE is activated again.

The MME sends an ISR activation indication to the UE via TAU ACCEPT.

Upon receipt of a TAU ACCEPT message with an ISR activation indication, the UE checks whether the UE's periodic routing area update timer expires, and if so, activates or restarts the UE's GERAN / UTRAN ISR deactivation timer.

Embodiment 3 according to the present invention provides an apparatus on the first network side for optimizing the activation / deactivation of the ISR, and has the following means as shown in FIG.

The first activation determining means 801, when the UE receives the context request message through the device of the second network side upon the area update, a mobile reachable timer and / or implicit detach corresponding to the UE. The activation or deactivation of the ISR is determined according to the operation state of the implicit detach timer.

The transmitting means 802 transmits the determination result to the apparatus on the second network side.

Preferably, the first activation determining means 801 specifically confirms ISR deactivation when the Mobile Reachable timer corresponding to the UE expires or implicit detach timer corresponding to the UE. If ISR is in operation, ISR deactivation is confirmed.

Alternatively, the first activation determining means 801 is specifically, if the implicit detach timer (Implicit Detach Timer) corresponding to the UE is running at the same time as the expiration of the mobile reachable timer (Mobile Reachable timer) corresponding to the UE, ISR Confirm activation.

When the device on the first network side determines that the activation / deactivation indication of the ISR fed back from the device on the second network side is an ISR activation indication, an implicit detach timer corresponding to the UE is operating. If it is determined, the apparatus further includes detach timer reactivation means 803 for activating or reactivating an implicit detach timer corresponding to the UE.

In addition, the first activation determining means 801, specifically, if the mobile reachable timer (Mobile Reachable timer) corresponding to the UE is less than the final confirmation ISR activation.

In this embodiment, when the implicit Detach Timer is activated again, its designated time is longer than the designated time of the ISR deactivation timer of the first network of the UE.

The device on the first network side is a mobility management entity (MME), the device on the second network side is a serving GPRS support node (SGSN), and the ISR deactivation timer of the first network of the UE is an E-UTRAN ISR deactivation timer. .

Or the device on the first network side is SGSN, the device on the second network side is an MME, and the ISR deactivation timer of the first network of the UE is a GERAN / UTRAN ISR deactivation timer.

In addition, an embodiment according to the present invention further provides a user terminal UE and includes the following means as shown in FIG. 9.

The instruction receiving means 901 receives an ISR activation instruction sent by the network side in the area update process of the second network.

Upon receiving the ISR activation instruction, the ISR deactivation timer reactivation means 902 activates or reactivates the ISR deactivation timer of the first network of the UE if the expiration of the periodic area update timer of the first network of the UE is determined. .

Preferably, the area update process of the second network is a routing area update process, and the periodic area update timer of the first network is a periodic tracking area update timer. Preferably, the ISR deactivation timer of the first network is an E-UTRAN ISR deactivation timer.

Alternatively, the area update process of the second network is a tracking area update process, the periodic area update timer of the first network is a periodic routing area update timer, and the ISR deactivation timer of the first network is GERAN / UTRAN ISR deactivation. It is a timer.

It will be apparent to those skilled in the art that the embodiments according to the present invention can be provided as a method, a system, or a computer program product. Thus, the present invention may employ the form of a fully hardware embodiment, a fully software embodiment or a combination of software and hardware embodiments. In addition, the present invention may employ a form of one or more computer program products executed on a computer usable storage medium (including but not limited to disk memory and optical memory, etc.) containing computer usable program code. .

The present invention is described with reference to flowcharts and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present invention. It should be understood that computer program instructions may realize the combination of each procedure and / or block in the flowchart and / or block diagram with the procedure and / or block in the flowchart and / or block diagram. By providing such a computer program instruction to a processor of a general purpose computer, a dedicated computer, an embedded processor or other programmable data processing apparatus to create a machine, it is possible, via a command issued by a processor of the computer or other programmable data processing apparatus , An apparatus for implementing the functions specified in one or more blocks of the flowchart and / or block diagrams of the flowcharts.

Such a computer program instruction may also be stored in a computer-readable memory that guides the computer or other programmable data processing apparatus to operate in a specified manner to thereby generate an article of manufacture containing the command device via a command stored in the computer- And the command device implements the functions specified in one or more blocks of one or more procedures and / or block diagrams in the flowchart.

Such a computer program instruction may also be implemented in a computer or other programmable data processing apparatus to execute a series of operating steps on a computer or other programmable device to create a computer implemented processing, Instructions issued on the device provide steps for implementing the functions specified in one or more of the flowchart and / or block diagrams in one or more blocks of the flowchart.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (21)

In the UE's area update process, a first network entity receives a context request message sent by a second network entity, and a mobile reachable timer and an implicit detach timer corresponding to the UE. Determining activation or deactivation of idle state signaling reduction (ISR) in accordance with at least one operating condition of a timer; And
Sending, by the first network entity, a confirmation result to a second network entity, confirming that the second network entity instructs the UE to activate or deactivate the ISR according to the confirmation result;
And wherein the first network entity belongs to a first network and the second network entity belongs to a second network.
The method of claim 1,
The first network entity determines the activation or deactivation of the ISR according to at least one operation state of a mobile reachable timer corresponding to the UE and an implicit detach timer.
Determining ISR deactivation when a mobile reachable timer corresponding to the UE has already expired; or
Determining an ISR deactivation when an implicit detach timer corresponding to the UE is in operation; or
Determining an ISR deactivation when a mobile reachable timer corresponding to the UE has already expired and an implicit detach timer corresponding to the UE is in operation.
And activating / deactivating idle state signaling reduction (ISR).
The method of claim 1,
The first network entity determines the activation or deactivation of the ISR according to an operation of at least one of a mobile reachable timer corresponding to the UE and an implicit detach timer.
Determining an ISR activation when a mobile reachable timer corresponding to the UE expires or an implicit detach timer corresponding to the UE is in operation;
And activating / deactivating idle state signaling reduction (ISR).
The method of claim 3,
If it is determined that the activation or deactivation indication of the ISR fed back from the second network entity is an ISR activation indication, the first network entity stops and restarts an implicit detach timer corresponding to the UE. doing
And activating / deactivating idle state signaling reduction (ISR).
5. The method of claim 4, wherein the designation time of the reactivated implicit detach timer corresponding to the UE is longer than the designation time of the ISR deactivation timer of the first network of the UE.
And activating / deactivating idle state signaling reduction (ISR).
The method of claim 1,
When the UE receives an ISR activation indication sent by a second network entity, if the periodic update timer of the first network of the UE expires, the UE stops and restarts the ISR deactivation timer of the first network. And activating / deactivating idle state signaling reduction (ISR).
7. The method according to any one of claims 1 to 6,
The area update process is a routing area update process, the first network entity is a Mobility Management Entity (MME), and the second network entity is a SGSN (Serving GPRS Support Node); or
Wherein the area update process is a tracking area update process, wherein the first network entity is an SGSN and the second network entity is an MME.
8. The method of claim 7,
If the area update process is a routing area update process, the ISR deactivation timer of the first network of the UE is an E-UTRAN ISR deactivation timer, and the periodic timer of the first network of the UE is a periodic tracking area update timer; or
If the area update process is a tracking area update process, the ISR deactivation timer of the first network of the UE is a GERAN / UTRAN ISR deactivation timer, and the periodic timer of the first network of the UE is a periodic routing area update timer.
And activating / deactivating idle state signaling reduction (ISR).
The method of claim 1,
The first network entity determines the activation or deactivation of the ISR according to an operation of at least one of a mobile reachable timer corresponding to the UE and an implicit detach timer.
And determining an ISR activation when a mobile reachable timer corresponding to the UE is less than a fee.
Receiving, by a UE located in the first network, an ISR activation indication sent from the network side in an area update process of the second network; And
When the expiration of the periodic area update timer of the first network of the UE is determined, the UE operating or stopping by restarting the ISR deactivation timer of the first network of the UE; ISR operation method.
The method of claim 10,
The area update process of the second network is a routing area update process, the periodic area update timer of the first network is a periodic tracking area update timer, and the ISR deactivation timer of the first network is an E-UTRAN ISR deactivation timer or ; or
The area update process of the second network is a tracking area update process, the periodic area update timer of the first network is a periodic routing area update timer, and the ISR deactivation timer of the first network is a GSM / EDGE radio access network (GERAN). / Universal Terrestrial Radio Access Network (UTRAN) ISR operation method of the UE side, characterized in that the timer.
Located on the first network,
In the UE's area update process, upon receiving a context request message sent by a device on a second network side in a second network, a mobile reachable timer corresponding to the UE and an implicit detach timer ( First activation determining means for confirming activation or deactivation of the ISR according to at least one operating condition of an Implicit Detach Timer; And
Transmitting means for transmitting a result of the determination to the apparatus of the second network side, wherein the apparatus of the first network side optimizes the activation / deactivation of the ISR.
13. The method of claim 12,
Specifically, the first activation determining means specifically determines ISR deactivation when a mobile reachable timer corresponding to the UE expires, or an implicit detach timer corresponding to the UE. ) To confirm ISR deactivation
And device on the first network side optimizing activation / deactivation of the ISR.
13. The method of claim 12,
Specifically, the first activation determining means, when the mobile reachable timer corresponding to the UE expires or when the implicit detach timer (Implicit Detach Timer) corresponding to the UE is in operation, ISR To confirm activation
And device on the first network side optimizing activation / deactivation of the ISR.
The method of claim 14,
If it is determined that the activation / deactivation indication of the ISR fed back from the device on the second network side is the ISR activation indication, reactivation for stopping and reactivating the implicit detach timer corresponding to the UE is performed. Further comprising means
And device on the first network side optimizing activation / deactivation of the ISR.
16. The method of claim 15,
The designation time of the implicit detach timer corresponding to the re-enabled UE is longer than the designation time of the ISR deactivation timer of the first network of the UE. 1 Device on the network side.
The method according to any one of claims 12 to 16,
The area update process is a routing area update process, the device on the first network side is a Mobility Management Entity (MME), and the device on the second network side is a Serving GPRS Support Node (SGSN); or
The area update process is a tracking area update process, wherein the device on the first network side is SGSN and the device on the second network side is MME.
18. The method of claim 17,
If the area update process is a routing area update process, the ISR deactivation timer of the first network of the UE is an E-UTRAN ISR deactivation timer;
And if the area update process is a tracking area update process, the ISR deactivation timer of the first network of the UE is a GERAN / UTRAN ISR deactivation timer.
13. The method of claim 12,
And the first activation determining means determines the ISR activation when the mobile reachable timer corresponding to the UE is less than the minimum.
A user device UE located in a first network, the
Instruction receiving means for receiving an ISR activation instruction sent by the network side in an area update process of a second network; And
Means for reactivating the ISR deactivation timer for starting or stopping and reactivating the ISR deactivation timer of the first network of the UE when the periodic area update timer of the first network of the UE expires upon receiving the ISR activation indication; Containing
User equipment (UE), characterized in that.
The method of claim 20,
The area update process of the second network is a routing area update process, the periodic area update timer of the first network is a periodic tracking area update timer, and the ISR deactivation timer of the first network is an E-UTRAN ISR deactivation timer or ; or
The area update process of the second network is a tracking area update process, the periodic area update timer of the first network is a periodic routing area update timer, and the ISR deactivation timer of the first network is a GERAN / UTRAN ISR deactivation timer. Characterized in that the user device UE.

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